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# E3-RevQs - 8 In an RSA system n = 391 and e = 137 what is d...

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1) What is the prime factorization of 175? Team #: _______________ Answer: _______________________________________ 2) Prove that 2 is a generator mod 13. Team #: _______________ Answer: _______________________________________ 3) What is the remainder when 37 129 is divided by 80? Team #: _______________ Answer: _______________________________________

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4) In an RSA scheme, p = 7, q = 13 and e = 5. What is d? Team #: _______________ Answer: _______________________________________ 5) Factor 20701 using the Fermat Factoring method. Team #: _______________ Answer: _______________________________________ 6) Given that n = 391, what is φ(n)? Team #: _______________ Answer: _______________________________________ 7) What is the value of 197 422 mod 211? Team #: _______________ Answer: _______________________________________
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Unformatted text preview: 8) In an RSA system, n = 391 and e = 137, what is d? Team #: _______________ Answer: _______________________________________ 9) In the knapsack cipher, if the public key is {193, 131, 27, 94, 138, 5, 211, 45} what is the ciphertext produced by encrypting the plaintext B6 , written in hexadecimal? Your answer should be a single positive integer (in decimal). Team #: _______________ Answer: _______________________________________ 10) Alice’s public El Gamal keys are p = 19, g = 3, and b = 14. You wish to send Alice the message M = 11. You choose the random value k = 4. What are the two ciphertexts (c 1 and c 2 ) that you send to Alice when you encrypt your message M(11)? Team #: _______________ Answer: _______________________________________...
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